Scientists say Midwest quakes poorly understood

April 19th, 2008 in Space & Earth / Earth Sciences
Scientists say Midwest quakes poorly understood (AP)

Map locates approximate epicenter, extent and seismic zone of origination of a magnitude-5.2 earthquake in the Midwest.

(AP) -- Scientists say they know far too little about Midwestern seismic zones like the one that rumbled to life under southern Illinois Friday morning, but some of what they do know is unnerving.

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